quarter day vs Great Britain

quarter day and Great Britain both are nouns.

Word	Noun	Adjective	Verb	Adverb
quarter day	Yes	No	No	No
Great Britain	Yes	No	No	No

quarter day (noun)	Great Britain (noun)
a Christian holy day; one of four specified days when certain payments are due	an island comprising England and Scotland and Wales
	a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom